Combination dirt and gravel grader and dump box



Nov. 28, 1939. F. N. KOLBERG 2,181,403

COMBINATION DIRT AND GRAVEL GRADER AND DUMP BOX Filed Aug. 2, 193a Patented Nov. 28, 1939 UNITED STATEE COMBINATION DIET AND GRAVEL GRADER AND DUlWP BOX Frithjof N. Kolberg, Sioux Falls, s. Dak. Application August 2, 1938, Serial No. 222,687

6 Claims.

This invention relates to a combination dirt and gravel grader and dump box, and pertains more particularly to an apparatus of the character which is readily adapted to grading or the loading and dumping of material.

The primary important object of this invention is to provide'an apparatus of the above character into which material is automatically load-ed during the grading operation.

Another important object of this invention is to provide an apparatus of the above character into which material is loaded through the front thereof, when the same is moving in a forward direction and from the rear of which material may be readily dumped either while same is in motion or is stationary.

A further important object of this invention is to provide a device of the above character in which the body of the apparatus may be readily and quickly adjusted relative to its supporting structure so as to regulate the amount of material to be removed during the grading operation and/or to vary the inclination of the body so as to quickly and eiilciently dump the gathered material therefrom.

. The foregoing and other objects and advantages will be readily apparent throughout the course of the following description and accompanying drawing, in which Figure 1 is a fragmentary side elevation of the apparatus with the body in load carrying position,

Figure 2 is a fragmentary side elevation of same in dumping position, and

Figure 3 is an enlarged fragmentary detailed sectional view of one of the adjusting members.

Referring in detail to the drawing, I designates one side of a bed frame or chassis of substantially rectangular form when viewed in plan and which is supported above the surface to be operated upon by means of ground engaging wheels 2 secured thereto byoutwardly extending axles 3 whose inner ends are connected to the adjacent sides of the frame in any suitable manner.

Disposed between the sides and ends of the body frame for swinging movement therein is a material receiving body 4 which has its front end adjustably supported from said frame by means of a cable 5 actuated by a hydraulic elevator 8 or any suitably powered hoist.

Extending outwardly at right angles to each side of the frame I adjacent their rear ends is 'a stub shaft 7 upon each of which is rotatably supported a sleeve or hub 8 provided with an eccentric pin 9 and a circumferential notched flange Iii extending at right angles thereto.

The rear end of the body 4 is supported on either side from the frame by means of a link H having its forward end pivotally connected to the body at I2 and its opposite or rear end pivoted tothe eccentric pin 9 carried by the sleeve or hub 3. J

Each of the sides I of the frame is provided with a depending part I3 formed With a'vertically extending slot I4 in which latter is adjustably received a releasable bolt I5 connecting one end of a link I6. The rear end of the link It is pivotally connected to the rear portion of the body 4 as at I 1.

The front end of. the body 4 is provided with a transverse opening across the lower edge of which extends a surface cutting toothed bar or blade I 8. The opening in the front of the body is adapt ed to be closed by a gravity actuated door or gate I9 pivotally secured at its upper edge to the body as at 20. The rear open end of the body is adapted to be closed by a gate 2| pivotally secured at its upper edge to the body as at 22. The gate 2I is held in its normal or closed position by means of a hooked latch 23 pivoted at 24 to the rear end of the body and which engages over an outwardly extending pin 25 carried by the gate. The latch 23 is arranged to be automatically released when the body is moved to dumping position, Fig. 2, by means of a cable 26 connecting the latch to the rear end of the body frame.

In order to lock the notched flange I0 and thereby the sleeve or hub 8 in various positions to adjust the link II, a removable pin 21 is inserted or removed from the side of the frame I.

In operation, when it is desired to grade a surface by means of the cutting or toothed edge I8, notched flange Ill is rotated in either direction so as to cause eccentric pin 9 to move the link II forwardly and thereby by the receptacle 4 to the properinclination dependent upon the amount of surface to be removed.

Before the receptacle is filled with material, link I6 is adjusted to the desired position so as to give the proper pitch and clearance when the front end of the receptacle is elevated by the cable 6, thus causing the loaded material to be discharged through the automatic rear closure or gate 2 I. Following release of tension after dump ing, cable 26 acts to limit forward movement of the scoop 4.

It will thus be seen from the foregoing description that the position of the receptacle 4 may be readily and quickly varied with respect to the working surface by the pairs of links H and I6. Further, during the digging operation, all shock transmitted through the cutting element is absorbed by links I6.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. An apparatus of the type set forth, including an open frame, a scoop within the frame having digging means adjacent its front end, links pivoted to the rear end of the scoop adjacent the bottom portion thereof, and to the frame at points below the top of the frame, other links pivoted to the scoop at the rear end thereof, and ad jacent the topportion thereof, and extending outwardly and downwardly from the rear end of the scoop and pivoted to the upper portion of the frame, means to raise and lower the front end of the scoop and means to limit forward movement of the scoop in dumping thereof, thereby to retain the other named links in a substan* tially vertical position.

2. An apparatus of the type set forth, including an' open frame, a scoop within the frame having digging means adjacent its front end, links pivoted to the upper rear end of the scoop and extending downwardly therefrom and pivoted to the frame at the rear of the latter, other links pivoted to the scoop at the rear thereof and to the frame and in digging position of the scoop lying substantially horizontally, and extending forwardly of the rear end of the scoop, means to raise and lower the scoop from the front thereof, and means to limit movement of the scoop so that in dumping position thereof said other links will occupy a substantially vertical position.

3. An apparatus of the type set forth, including an open frame, a scoop within the frame having digging means adjacent its front end, link means connected to the scoop adjacent the top and rear end thereof and depending therefrom and pivoted to the frame, other link means pivoted to the rear of the scoop and extending toward the front of the latter and pivoted to the rear of the frame, the pivotal connections of the links with the scoop being disposed one above the other and in substantially a vertical plane, in digging position of the scoop, means to raise and lower the scoop, and means to limit forward movement of the scoop during lowering thereof.

4. An apparatus of the type set forth, including an open frame, a scoop within the frame having digging means adjacent its front end, relatively short links pivoted to the upper rear end of the scoop and pivoted to the rear end of the frame, other relatively short links pivoted to the lower rear end of the scoop and to the frame and in digging position of the scoop extending forwardly of the latter, means to raise and lower the scoop from the front thereof, and means to limit movement of the scoop during lowering thereof.

5. An apparatus of the type set forth, including an open frame, a scoop within the frame having digging means adjacent its front end, links pivoted to the upper rear end of the scoop and extending therebeyond and pivoted to the rear end of the frame, other links pivoted to the lower rear end of the scoop and in digging position of the scoop extending forwardly of the latter and pivoted to the frame, means to raise and lower the scoop from the front thereof, and means to limit movement of the scoop during lowering thereof.

6. An apparatus of the type set forth in accordance with claim 3, wherein the said other link means are adjustable.

FRITHJ OF N. KOLBERG. 

